refactor: improve label placement

Author: jolars

crates/eunoia/examples/label_placement.rs

@@ -30,7 +30,7 @@ fn main() {
         Point::new(0.0, 10.0),
     ]);
     let centroid = square.centroid();
-    let pole = square.pole_of_inaccessibility(0.1);
+    let pole = square.pole_of_inaccessibility(0.01);
     println!("   Centroid: ({:.2}, {:.2})", centroid.x(), centroid.y());
     println!("   Pole:     ({:.2}, {:.2})", pole.x(), pole.y());
     println!("   → Similar positions (symmetric shape)\n");

web/src/lib/DiagramViewer.svelte

@@ -178,8 +178,12 @@
       combination: region.combination,
       totalArea: region.totalArea,
       polygons: region.polygons.map((polygon: any) => {
+        // Calculate precision relative to polygon size
+        // Use ~0.1% of the maximum dimension for good accuracy
+        const precision = maxDim * 0.001;
+        
         // Compute pole of inaccessibility on original coordinates
-        const pole = polygon.pole_of_inaccessibility(1.0);
+        const pole = polygon.pole_of_inaccessibility(precision);
         
         // Normalize vertices and label position
         return {